Disclaimer
This is an independent, personal project and does not represent official GO Transit fare zones, designs, or policies. All views are solely my own.
The zones shown are derived from publicly available
GO GTFS using Voronoi diagram in a projected coordinate reference system. The polygons were clipped to a custom-generated service boundary, designed to ensure all GO Transit stops and routes fall within it, and dissolved by zone identifier. Finally, the zones were reprojected to WGS84 for web visualization.